I was at an advanced Aikido class at our HQ dojo and we were doing kotegashi. Tori, who if I remember rightly is about 4th Dan threw my 3rd Kyu ass so hard that somehow I managed to land backside first, sitting crosslegged. Which would have been weird enough if I hadn't then skidded on my backside about 6-8ft managing to spin around 3 times before eventually coming to a full stop about 12 inches from the wall, all the while still sitting crosslegged.